In a retrospective series of 169 eyes, a formula combining the original IOL, biometry and manifest refraction predicted lens-exchange outcomes more accurately than Barrett Rx.
doi: 10.1016/j.ophtha.2026.01.017A meta-analysis of 28 studies found lower mean absolute error with Hill-RBF 3.0 than with Haigis, Holladay 1 and SRK/T. Performance was more often comparable against newer formulas.
doi: 10.1016/j.jcjo.2026.01.005A network meta-analysis of 15 studies and 1,178 eyes shorter than 22 mm placed Kane, Haigis and Olsen Standalone among the most accurate formulas. A statistically definitive single winner has not emerged.
doi: 10.1097/j.jcrs.0000000000001793A network meta-analysis of 9 studies and 399 eyes compared 7 formulas for flanged intrascleral IOL fixation. Barrett Universal II ranked consistently well, but no formula showed statistically significant superiority.
doi: 10.1007/s00417-026-07462-3A network meta-analysis of 7 studies and 1,060 eyes compared 12 IOL formulas after vitrectomy with silicone oil tamponade. Kane ranked first within ±0.50 D, while EVO led within ±1.00 D.
doi: 10.1159/000551331The study compared eight modern IOL power formulas in cataract patients with extremely long eyes.
doi: 10.1016/j.ajo.2026.05.026